Means for ventilating mine-workings and the like.



S. NETTLETON.

MEANS FOR VENTILATING MINE WORKINGS AND THE LIKE. APPLICATION FILEDIIov. I7. I9I4.

1 ,274,438. Patented Aug. 6, 1918.

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STANLEY NETTLETON, 0F JOHANNESBURG, TRANSVAAL, SOUTH AFRICA. i

MEANS FOR VENTILATING MINE-YVRKINGS AND THE LIKE.

Specification of Letters Patent.

Patented Aug. 6, 191s.

Application filed November 17, 1914. Serial No. 872,594.

T0 all whom it may concern:

Be it known that STANLEY Nn'r'rLn'roN, subject of the King of GreatBritain, and residing at National Mutual Buildings, Johannesburg,Province of the Transvaal, Union of bouth Africa, has invented certainnew and useful Improvements in cans for Ventilating Mine-workings andthe like, of which the following is a specification.

This invention relates to means for ventilating mine workings and thelike whereby pure air under low pressure is forced into the workings todisplace the foul air or gases.

For Ventilating in this manner light sheet metal conduits have beenproposed for the conveyance of the air. Such conduits are expensive toinstall and are easily damaged by passing traiiic and by blastingoperations. Vooden conduits have also been tried but owing to warpingand decay they are of little service and are expensive to keep in properorder.

The object of this invention is to provide a conduit which is cheap,easy to install, and free from the drawbacks of the conduits abovementioned.

The invention is illustrated in the accompanying drawings in which-Figure I shows the improved means in a vertical shaft or working.

Fig. II shows the arrangement modified for an inclined working.

Fig. III is an enlarged partly sectional view of a portion of theconduit.

Fig. IV is a plan thereof.

Fig. V is an enlarged sectional 'elevation of a preferred air forcingdevice.

Fig. VI is a perspective view showing means for making joints in theconduit.

1, in Figs. I, II, and V indicates any suittable device for forcing avolume of air under low pressure. The delivery thereof consists of aconduit 2 extending into the mine working 3 which is required to beventilated.

Said conduit 2 is constructed of brattice cloth or other suitablefabric, woven or otherwise made into tubular form. Generally the conduitis made in sections el adapted to be readily connected to anddisconnected from one another.

For this purpose they are as shown in Fig.

III provided at their ends 5 with rings (5 which may be sewn into helns7. Said rings are of equal and similar dimensions; they are adapted tobe passed through one another angular-ly and then brought together faceto face and thereby interlock.

In order to permit the rings (3 to pass through one another they may bemade resiliently deformable; but it is preferable, especially in thelarger sizes, to make them rigid and of elliptical shape. In this casethey are presented angularly to one another with the short axis of onecoinciding with the long axis of the other as shown in Fig. VI; the onepassed through the other and then turned so that they coincide whereuponthey are pulled together and caused to interlock as shown in Fig. III.

Fig. I shows a length of conduit 1 drawn to a small scale and hanging ina vertical mine shaft. During blasting operations the end of the conduitmay be raised to a position indicated in the dotted lines by means of arope 8 connected to the bottom of the conduit.

In Fig. II the conduit 1 is shown hanging in an inclined shaft suspendedfrom the roof by ropes or chains 9. When necessary the conduit may bepulled up to a position shown in the dotted lines and protected by abatter board 10.

The preferred air forcing device is shown in section to an enlargedscale in Fig. V.

High pressure air from a suitable source is caused to issue as a jetfrom nozzle 11.

12 is a cone terminating in a restriction 13 which opens into a secondcone 14 connected to the conduit l. The jet of high pressure air forcesthe atmospheric air through restriction 13 and induces a supply throughthe mouth of the cone 12. It has been found that with this arrangementeddy currents in the air supply are reduced to a minimum and higheflicicncy is obtained from the apparatus.

I claim:

1. In a Ventilating conduit, the combination of a plurality of sectionsof fabric tube and rings of regular non-circular form at the endsthereof adapted to pass through one another when angular-ly displacedand thereafter rotated to interlock.

2. A Ventilating conduit comprising Sec- In testimony whereof I affix mysignature tions oi. fabric tube providecl at their ends in presence oftwo Witnesses. With elllptioel interlocking rings. u t STANLEYNETTLETO-N.

3. In it Ventilating conduit, the combina` Y 5 tion of a plurality ofsections of brett-ice Witnesses: 1 K,

cloth tubes and elliptical rings 'at the encls WESLEY E. JOHN',` thereoffor coupling said sections together. l CICELY I. BLINDELL.

Copiges of thivsrpatent may be obtained for tive ents'ech, by addressingthe Commissioner of Patents,

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